On 27 October 2017, the European Commission presented the final Work Programme for Horizon 2020, covering the budgetary years 2018, 2019 and 2020 and representing an investment of around €30 billion. It may be particularly relevant Challenge 6 is on “Europe in a changing world – Inclusive, innovative and reflective societies”, tackling topics within the scope of migration, industrial and technological transformations, and governance for the future of Europe. Moreover, Challenge 7 deals with issues related to Smart cities and security matters.
You can get more details on the specific topics and requirements by consulting the work programmes. Here are the links to Challenge 6 and to Challenge 7.